Andricus hispanicus is a parthenogenetic species of wasp which causes the formation of marble galls on oak trees.

A. hispanicus was previously included in Andricus kollari, but the two are genetically distinct[2] and require different hosts to complete their life cycle.

[3] Sexual females lay their eggs in the developing buds of several species of white oaks using their ovipositor.

The wasp causes the formation of a round gall, where the larvae develop until they are ready to emerge as asexual females.

[3] The unfertilised eggs give rise to a new sexual generation of adult males and females, which mate and restart the cycle.